/*----------------------------------------------------------------------------/
/  FatFs - Generic FAT Filesystem module  R0.15                               /
/-----------------------------------------------------------------------------/
/
/ Copyright (C) 2022, ChaN, all right reserved.
/
/ FatFs module is an open source software. Redistribution and use of FatFs in
/ source and binary forms, with or without modification, are permitted provided
/ that the following condition is met:

/ 1. Redistributions of source code must retain the above copyright notice,
/    this condition and the following disclaimer.
/
/ This software is provided by the copyright holder and contributors "AS IS"
/ and any warranties related to this software are DISCLAIMED.
/ The copyright owner or contributors be NOT LIABLE for any damages caused
/ by use of this software.
/
/----------------------------------------------------------------------------*/

#ifndef FF_DEFINED
#define FF_DEFINED 80286 /* Revision ID */

#ifdef __cplusplus
extern "C" {
#endif

#include "ffconf.h" /* FatFs configuration options */

#if FF_DEFINED != FFCONF_DEF
#error Wrong configuration file (ffconf.h).
#endif

/* Integer types used for FatFs API */

#if defined(_WIN32) /* Windows VC++ (for development only) */
#define FF_INTDEF 2
#include <windows.h>
typedef unsigned __int64 QWORD;
#include <float.h>
#define isnan(v) _isnan(v)
#define isinf(v) (!_finite(v))

#elif (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__cplusplus) /* C99 or later */
#define FF_INTDEF 2
#include <stdint.h>
typedef unsigned int  UINT; /* int must be 16-bit or 32-bit */
typedef unsigned char BYTE; /* char must be 8-bit */
typedef uint16_t	  WORD; /* 16-bit unsigned integer */
typedef uint32_t	  DWORD; /* 32-bit unsigned integer */
typedef uint64_t	  QWORD; /* 64-bit unsigned integer */
typedef WORD		  WCHAR; /* UTF-16 character type */

#else /* Earlier than C99 */
#define FF_INTDEF 1
typedef unsigned int   UINT; /* int must be 16-bit or 32-bit */
typedef unsigned char  BYTE; /* char must be 8-bit */
typedef unsigned short WORD; /* 16-bit unsigned integer */
typedef unsigned long  DWORD; /* 32-bit unsigned integer */
typedef WORD		   WCHAR; /* UTF-16 character type */
#endif

/* Type of file size and LBA variables */

#if FF_FS_EXFAT
#if FF_INTDEF != 2
#error exFAT feature wants C99 or later
#endif
typedef QWORD FSIZE_t;
#if FF_LBA64
typedef QWORD LBA_t;
#else
typedef DWORD LBA_t;
#endif
#else
#if FF_LBA64
#error exFAT needs to be enabled when enable 64-bit LBA
#endif
typedef DWORD		  FSIZE_t;
typedef DWORD		  LBA_t;
#endif

/* Type of path name strings on FatFs API (TCHAR) */

#if FF_USE_LFN && FF_LFN_UNICODE == 1 /* Unicode in UTF-16 encoding */
typedef WCHAR TCHAR;
#define _T(x)	 L##x
#define _TEXT(x) L##x
#elif FF_USE_LFN && FF_LFN_UNICODE == 2 /* Unicode in UTF-8 encoding */
typedef char		  TCHAR;
#define _T(x)	 u8##x
#define _TEXT(x) u8##x
#elif FF_USE_LFN && FF_LFN_UNICODE == 3 /* Unicode in UTF-32 encoding */
typedef DWORD		   TCHAR;
#define _T(x)	 U##x
#define _TEXT(x) U##x
#elif FF_USE_LFN && (FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3)
#error Wrong FF_LFN_UNICODE setting
#else /* ANSI/OEM code in SBCS/DBCS */
typedef char TCHAR;
#define _T(x)	 x
#define _TEXT(x) x
#endif

/* Definitions of volume management */

#if FF_MULTI_PARTITION /* Multiple partition configuration */
typedef struct {
	BYTE pd; /* Physical drive number */
	BYTE pt; /* Partition: 0:Auto detect, 1-4:Forced partition) */
} PARTITION;
extern PARTITION VolToPart[]; /* Volume - Partition mapping table */
#endif

#if FF_STR_VOLUME_ID
#ifndef FF_VOLUME_STRS
extern const char *VolumeStr[FF_VOLUMES]; /* User defied volume ID */
#endif
#endif

/* Filesystem object structure (FATFS) */

typedef struct {
	BYTE fs_type; /* Filesystem type (0:not mounted) */
	BYTE pdrv; /* Volume hosting physical drive */
	BYTE ldrv; /* Logical drive number (used only when FF_FS_REENTRANT) */
	BYTE n_fats; /* Number of FATs (1 or 2) */
	BYTE wflag; /* win[] status (b0:dirty) */
	BYTE fsi_flag; /* FSINFO status (b7:disabled, b0:dirty) */
	WORD id; /* Volume mount ID */
	WORD n_rootdir; /* Number of root directory entries (FAT12/16) */
	WORD csize; /* Cluster size [sectors] */
#if FF_MAX_SS != FF_MIN_SS
	WORD ssize; /* Sector size (512, 1024, 2048 or 4096) */
#endif
#if FF_USE_LFN
	WCHAR *lfnbuf; /* LFN working buffer */
#endif
#if FF_FS_EXFAT
	BYTE *dirbuf; /* Directory entry block scratchpad buffer for exFAT */
#endif
#if !FF_FS_READONLY
	DWORD last_clst; /* Last allocated cluster */
	DWORD free_clst; /* Number of free clusters */
#endif
#if FF_FS_RPATH
	DWORD cdir; /* Current directory start cluster (0:root) */
#if FF_FS_EXFAT
	DWORD cdc_scl; /* Containing directory start cluster (invalid when cdir is 0) */
	DWORD cdc_size; /* b31-b8:Size of containing directory, b7-b0: Chain status */
	DWORD cdc_ofs; /* Offset in the containing directory (invalid when cdir is 0) */
#endif
#endif
	DWORD n_fatent; /* Number of FAT entries (number of clusters + 2) */
	DWORD fsize; /* Number of sectors per FAT */
	LBA_t volbase; /* Volume base sector */
	LBA_t fatbase; /* FAT base sector */
	LBA_t dirbase; /* Root directory base sector (FAT12/16) or cluster (FAT32/exFAT) */
	LBA_t database; /* Data base sector */
#if FF_FS_EXFAT
	LBA_t bitbase; /* Allocation bitmap base sector */
#endif
	LBA_t winsect; /* Current sector appearing in the win[] */
	BYTE  win[FF_MAX_SS]; /* Disk access window for Directory, FAT (and file data at tiny cfg) */
} FATFS;

/* Object ID and allocation information (FFOBJID) */

typedef struct {
	FATFS *fs; /* Pointer to the hosting volume of this object */
	WORD   id; /* Hosting volume's mount ID */
	BYTE   attr; /* Object attribute */
	BYTE   stat; /* Object chain status (b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session,
					b2:sub-directory stretched) */
	DWORD	sclust; /* Object data start cluster (0:no cluster or root directory) */
	FSIZE_t objsize; /* Object size (valid when sclust != 0) */
#if FF_FS_EXFAT
	DWORD n_cont; /* Size of first fragment - 1 (valid when stat == 3) */
	DWORD n_frag; /* Size of last fragment needs to be written to FAT (valid when not zero) */
	DWORD c_scl; /* Containing directory start cluster (valid when sclust != 0) */
	DWORD c_size; /* b31-b8:Size of containing directory, b7-b0: Chain status (valid when c_scl != 0) */
	DWORD c_ofs; /* Offset in the containing directory (valid when file object and sclust != 0) */
#endif
#if FF_FS_LOCK
	UINT lockid; /* File lock ID origin from 1 (index of file semaphore table Files[]) */
#endif
} FFOBJID;

/* File object structure (FIL) */

typedef struct {
	FFOBJID obj; /* Object identifier (must be the 1st member to detect invalid object pointer) */
	BYTE	flag; /* File status flags */
	BYTE	err; /* Abort flag (error code) */
	FSIZE_t fptr; /* File read/write pointer (Zeroed on file open) */
	DWORD	clust; /* Current cluster of fpter (invalid when fptr is 0) */
	LBA_t	sect; /* Sector number appearing in buf[] (0:invalid) */
#if !FF_FS_READONLY
	LBA_t dir_sect; /* Sector number containing the directory entry (not used at exFAT) */
	BYTE *dir_ptr; /* Pointer to the directory entry in the win[] (not used at exFAT) */
#endif
#if FF_USE_FASTSEEK
	DWORD *cltbl; /* Pointer to the cluster link map table (nulled on open, set by application) */
#endif
#if !FF_FS_TINY
	BYTE buf[FF_MAX_SS]; /* File private data read/write window */
#endif
} FIL;

/* Directory object structure (DIR) */

typedef struct {
	FFOBJID obj; /* Object identifier */
	DWORD	dptr; /* Current read/write offset */
	DWORD	clust; /* Current cluster */
	LBA_t	sect; /* Current sector (0:Read operation has terminated) */
	BYTE	 *dir; /* Pointer to the directory item in the win[] */
	BYTE	fn[12]; /* SFN (in/out) {body[8],ext[3],status[1]} */
#if FF_USE_LFN
	DWORD blk_ofs; /* Offset of current entry block being processed (0xFFFFFFFF:Invalid) */
#endif
#if FF_USE_FIND
	const TCHAR *pat; /* Pointer to the name matching pattern */
#endif
} DIR;

/* File information structure (FILINFO) */

typedef struct {
	FSIZE_t fsize; /* File size */
	WORD	fdate; /* Modified date */
	WORD	ftime; /* Modified time */
	BYTE	fattrib; /* File attribute */
#if FF_USE_LFN
	TCHAR altname[FF_SFN_BUF + 1]; /* Alternative file name */
	TCHAR fname[FF_LFN_BUF + 1]; /* Primary file name */
#else
	 TCHAR fname[12 + 1]; /* File name */
#endif
} FILINFO;

/* Format parameter structure (MKFS_PARM) */

typedef struct {
	BYTE  fmt; /* Format option (FM_FAT, FM_FAT32, FM_EXFAT and FM_SFD) */
	BYTE  n_fat; /* Number of FATs */
	UINT  align; /* Data area alignment (sector) */
	UINT  n_root; /* Number of root directory entries */
	DWORD au_size; /* Cluster size (byte) */
} MKFS_PARM;

/* File function return code (FRESULT) */

typedef enum {
	FR_OK = 0, /* (0) Succeeded */
	FR_DISK_ERR, /* (1) A hard error occurred in the low level disk I/O layer */
	FR_INT_ERR, /* (2) Assertion failed */
	FR_NOT_READY, /* (3) The physical drive cannot work */
	FR_NO_FILE, /* (4) Could not find the file */
	FR_NO_PATH, /* (5) Could not find the path */
	FR_INVALID_NAME, /* (6) The path name format is invalid */
	FR_DENIED, /* (7) Access denied due to prohibited access or directory full */
	FR_EXIST, /* (8) Access denied due to prohibited access */
	FR_INVALID_OBJECT, /* (9) The file/directory object is invalid */
	FR_WRITE_PROTECTED, /* (10) The physical drive is write protected */
	FR_INVALID_DRIVE, /* (11) The logical drive number is invalid */
	FR_NOT_ENABLED, /* (12) The volume has no work area */
	FR_NO_FILESYSTEM, /* (13) There is no valid FAT volume */
	FR_MKFS_ABORTED, /* (14) The f_mkfs() aborted due to any problem */
	FR_TIMEOUT, /* (15) Could not get a grant to access the volume within defined period */
	FR_LOCKED, /* (16) The operation is rejected according to the file sharing policy */
	FR_NOT_ENOUGH_CORE, /* (17) LFN working buffer could not be allocated */
	FR_TOO_MANY_OPEN_FILES, /* (18) Number of open files > FF_FS_LOCK */
	FR_INVALID_PARAMETER /* (19) Given parameter is invalid */
} FRESULT;

/*--------------------------------------------------------------*/
/* FatFs Module Application Interface                           */
/*--------------------------------------------------------------*/

FRESULT f_open(FIL *fp, const TCHAR *path, BYTE mode); /* Open or create a file */
FRESULT f_close(FIL *fp); /* Close an open file object */
FRESULT f_read(FIL *fp, void *buff, UINT btr, UINT *br); /* Read data from the file */
FRESULT f_write(FIL *fp, const void *buff, UINT btw, UINT *bw); /* Write data to the file */
FRESULT f_lseek(FIL *fp, FSIZE_t ofs); /* Move file pointer of the file object */
FRESULT f_truncate(FIL *fp); /* Truncate the file */
FRESULT f_sync(FIL *fp); /* Flush cached data of the writing file */
FRESULT f_opendir(DIR *dp, const TCHAR *path); /* Open a directory */
FRESULT f_closedir(DIR *dp); /* Close an open directory */
FRESULT f_readdir(DIR *dp, FILINFO *fno); /* Read a directory item */
FRESULT f_findfirst(DIR *dp, FILINFO *fno, const TCHAR *path, const TCHAR *pattern); /* Find first file */
FRESULT f_findnext(DIR *dp, FILINFO *fno); /* Find next file */
FRESULT f_mkdir(const TCHAR *path); /* Create a sub directory */
FRESULT f_unlink(const TCHAR *path); /* Delete an existing file or directory */
FRESULT f_rename(const TCHAR *path_old, const TCHAR *path_new); /* Rename/Move a file or directory */
FRESULT f_stat(const TCHAR *path, FILINFO *fno); /* Get file status */
FRESULT f_chmod(const TCHAR *path, BYTE attr, BYTE mask); /* Change attribute of a file/dir */
FRESULT f_utime(const TCHAR *path, const FILINFO *fno); /* Change timestamp of a file/dir */
FRESULT f_chdir(const TCHAR *path); /* Change current directory */
FRESULT f_chdrive(const TCHAR *path); /* Change current drive */
FRESULT f_getcwd(TCHAR *buff, UINT len); /* Get current directory */
FRESULT f_getfree(const TCHAR *path, DWORD *nclst, FATFS **fatfs); /* Get number of free clusters on the drive */
FRESULT f_getlabel(const TCHAR *path, TCHAR *label, DWORD *vsn); /* Get volume label */
FRESULT f_setlabel(const TCHAR *label); /* Set volume label */
FRESULT f_forward(FIL *fp, UINT (*func)(const BYTE *, UINT), UINT btf, UINT *bf); /* Forward data to the stream */
FRESULT f_expand(FIL *fp, FSIZE_t fsz, BYTE opt); /* Allocate a contiguous block to the file */
FRESULT f_mount(FATFS *fs, const TCHAR *path, BYTE opt); /* Mount/Unmount a logical drive */
FRESULT f_mkfs(const TCHAR *path, const MKFS_PARM *opt, void *work, UINT len); /* Create a FAT volume */
FRESULT f_fdisk(BYTE pdrv, const LBA_t ptbl[], void *work); /* Divide a physical drive into some partitions */
FRESULT f_setcp(WORD cp); /* Set current code page */
int		f_putc(TCHAR c, FIL *fp); /* Put a character to the file */
int		f_puts(const TCHAR *str, FIL *cp); /* Put a string to the file */
int		f_printf(FIL *fp, const TCHAR *str, ...); /* Put a formatted string to the file */
TCHAR  *f_gets(TCHAR *buff, int len, FIL *fp); /* Get a string from the file */

/* Some API fucntions are implemented as macro */

#define f_eof(fp)		((int)((fp)->fptr == (fp)->obj.objsize))
#define f_error(fp)		((fp)->err)
#define f_tell(fp)		((fp)->fptr)
#define f_size(fp)		((fp)->obj.objsize)
#define f_rewind(fp)	f_lseek((fp), 0)
#define f_rewinddir(dp) f_readdir((dp), 0)
#define f_rmdir(path)	f_unlink(path)
#define f_unmount(path) f_mount(0, path, 0)

/*--------------------------------------------------------------*/
/* Additional Functions                                         */
/*--------------------------------------------------------------*/

/* RTC function (provided by user) */
#if !FF_FS_READONLY && !FF_FS_NORTC
DWORD get_fattime(void); /* Get current time */
#endif

/* LFN support functions (defined in ffunicode.c) */

#if FF_USE_LFN >= 1
WCHAR ff_oem2uni(WCHAR oem, WORD cp); /* OEM code to Unicode conversion */
WCHAR ff_uni2oem(DWORD uni, WORD cp); /* Unicode to OEM code conversion */
DWORD ff_wtoupper(DWORD uni); /* Unicode upper-case conversion */
#endif

/* O/S dependent functions (samples available in ffsystem.c) */

#if FF_USE_LFN == 3 /* Dynamic memory allocation */
void *ff_memalloc(UINT msize); /* Allocate memory block */
void  ff_memfree(void *mblock); /* Free memory block */
#endif
#if FF_FS_REENTRANT /* Sync functions */
int	 ff_mutex_create(int vol); /* Create a sync object */
void ff_mutex_delete(int vol); /* Delete a sync object */
int	 ff_mutex_take(int vol); /* Lock sync object */
void ff_mutex_give(int vol); /* Unlock sync object */
#endif

/*--------------------------------------------------------------*/
/* Flags and Offset Address                                     */
/*--------------------------------------------------------------*/

/* File access mode and open method flags (3rd argument of f_open) */
#define FA_READ			 0x01
#define FA_WRITE		 0x02
#define FA_OPEN_EXISTING 0x00
#define FA_CREATE_NEW	 0x04
#define FA_CREATE_ALWAYS 0x08
#define FA_OPEN_ALWAYS	 0x10
#define FA_OPEN_APPEND	 0x30

/* Fast seek controls (2nd argument of f_lseek) */
#define CREATE_LINKMAP ((FSIZE_t)0 - 1)

/* Format options (2nd argument of f_mkfs) */
#define FM_FAT	 0x01
#define FM_FAT32 0x02
#define FM_EXFAT 0x04
#define FM_ANY	 0x07
#define FM_SFD	 0x08

/* Filesystem type (FATFS.fs_type) */
#define FS_FAT12 1
#define FS_FAT16 2
#define FS_FAT32 3
#define FS_EXFAT 4

/* File attribute bits for directory entry (FILINFO.fattrib) */
#define AM_RDO 0x01 /* Read only */
#define AM_HID 0x02 /* Hidden */
#define AM_SYS 0x04 /* System */
#define AM_DIR 0x10 /* Directory */
#define AM_ARC 0x20 /* Archive */

#ifdef __cplusplus
}
#endif

#endif /* FF_DEFINED */
